help@askiitians.com

+91-735-322-1155

Physical Chemistry> Colligative Properties...

question mark

1.5gm of a monobasic acid when disslved in 150g of water lowers Frezing pt by 0.165 degrees celsius.

0.5g of same acid when titrated,after dissolution in water, requires 37.5ml of N/10 alkali.Calculate degree of dissociation of acid(If Kf of water is 1.86)

Chilukuri Sai Kartik , 15 Years ago

Grade 12

3 Answers

SAGAR SINGH - IIT DELHI

Last Activity: 15 Years ago

Dear student,

Freezing point depression can be calculated using the Clausius-Clapeyron equation and Raoult's law. In a dilute ideal solution the freezing point is:

Freezing Point_total = Freezing Point_solvent - ΔT_f

where ΔT_f = molality * K_f * i

K_f = cryoscopic constant (1.86°C kg/mol for the freezing point of water)

i = Van't Hoff factor

Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation.

All the best.

Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.

Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar respectively : Click here to download the toolbar..

Askiitians Expert

Sagar Singh

B.Tech, IIT Delhi

Sourabh Dhavala

Last Activity: 12 Years ago

The answer is 18.34%. I''m not getting that answer.

tanay

Last Activity: 6 Years ago

∆T_b=(W2*1000)/(M_w2 × W₁₎

0.168=(1.86 X 1000)/(M X 100)

M = 11 0.71

N1 xV₁ = N₂x V₂

15.1/10 =(0.2×1000)/M.M (equivalent)

= 132.45

i= 132.45× 110.71 = 1+ a HX= H⁺+ X^-

alpha= 19.6

LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

Full Live Access

Study Material

Live Doubts Solving

Daily Class Assignments

Which of the following aqueous solutions remains neutral after
electrolysis

physical chemistry

0 Answer Available

Last Activity: 3 Years ago

In the reaction A + 2B ⇌ 2C, if 2 moles of A, 3 moles of B and 2 moles of C are placed in a 2 L flask and
the equilibrium concentration of C is 0.5 mol/L. The equilibrium constant (KC) for the reaction is.....and please tell how you know that the reaction is going forward .. imean how to calculate the reaction quotient ???

physical chemistry

1 Answer Available

Last Activity: 3 Years ago

True or false when an electron in ground state of hydrogen atom is excited with an energy that is greayer than e2-e1 but less than e3-e1 the electron will get excited n=2

physical chemistry

1 Answer Available

Last Activity: 3 Years ago

18 19 gram mixture of na2co3 and nahco3 on heating gives 2.2 gram CO2 gas find the percent nahco3 (by mass) in mixture

physical chemistry

1 Answer Available

Last Activity: 3 Years ago

A 100 cm cube solution of sodium carbonate is prepared by dissolving 8.653 g of salt in water the density of solution is 1.0816g per ml what are the molarity and molality of the solution.

physical chemistry

1 Answer Available

Last Activity: 3 Years ago

View all Questions